Some scenes that I noticed havent been posted before...
One is from the cartoon series Steven Universe, in which one of the characters eats what looks like a cloud and the puffs up like a balloon:(@6:00)
http://www.youtube.com/watch?v=k0dScMkPsgU
The other one is from an old Harry Enfield and Chums sketch (English comedy show from the 90s) in which there is a parody of a Benny Hill sketch crossed with Ben Elton, who at the time was a political satirist. The sketch shows him making sexy women more liberal looking and in one part covers her up in a one piece suit and blows her up: (Scene starts at 1:30 inflation starts at 1:55)
http://www.youtube.com/watch?v=0jm8zlLdk7w
Enjoy!
The first one, from Steven Universe, is quite well known now already. Been posted on fyahcartoonfatness.tumblr.com
The second one, however, I'm sure sure if I've heard of before. Nonetheless, it's not available in my country apparently so I can't determine this.